body{
    margin: 0px;
    background: url('/image/background.png') no-repeat fixed center; 
    background-size:cover;
}

#egg{
    z-index: 1;
    position: absolute;
    top: 20%;
    left: 10%;
}

#car{
    z-index: 2;
    position: absolute;
    top: 60%;
    left: 10%;
}
#login{
    z-index: 99;
    width:  400px;
    height: 300px;
}

.alertModel{
    display: none;
    position: absolute;
    z-index: 99;
    top: 40%;
    left: 20%;
}